add triangulation into the postvis view such that we can see the result

VadereGui/src/org/vadere/gui/components/view/SimulationRenderer.java

@@ -94,6 +94,7 @@ public abstract class SimulationRenderer extends DefaultRenderer {
 		}
 
 		if(model.isTriangulationVisible()) {
+			model.startTriangulation();
 			renderTriangulation(graphics, model.getTriangulation());
 		}
 

VadereGui/src/org/vadere/gui/postvisualization/model/PostvisualizationModel.java

@@ -141,6 +141,7 @@ public class PostvisualizationModel extends SimulationModel<PostvisualizationCon
 	public void init(final Scenario vadere, final String projectPath) {
 		// avoid the long computation
 		this.hideTriangulation();
+		this.triangulationTriggered = false;
 
 		this.vadere = vadere;
 		this.agentsByStep = new HashMap<>();